The OCP is pretty amazing, very cool and stealthy. Comes in handy for a person who plays the game trying not to knock anyone out. And it brings back the function that the ol' camera jammer did except more effective. Any anything that reminds me of that stupid device makes me laugh. However the sticky shocker is pretty amazing too like in the first game when you are in sewer you can aim it at the water and all 3 guards go down at once, hysterical. So i'd say the best would be OCP or shocker and the worst is the camera jammer. Also honorable mention to the disposable lock pick!!! So underused in the game, but when a guard is quickly coming down a hallway, you don't have time to take out the cumbersome lock pick set. So the disposable is O.K. in my book.

i think i used the disposable lock pick once in SC1. i forgot which level but i remember there was a part of the game when you walked into a well lit hallway (no shadows) and it triggered a guard walking around the corner, forcing you to use the pick and forcing you to get caught if you didn't since there was nowhere to hide.